21094580

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{79}}^2$

素因数の和:193

約数の個数: 54

約数和(自身を含む): 48583206

約数和(自身を除く): 27488626

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 79, 130, 158, 169, 260, 316, 338, 395, 676, 790, 845, 1027, 1580, 1690, 2054, 3380, 4108, 5135, 6241, 10270, 12482, 13351, 20540, 24964, 26702, 31205, 53404, 62410, 66755, 81133, 124820, 133510, 162266, 267020, 324532, 405665, 811330, 1054729, 1622660, 2109458, 4218916, 5273645, 10547290, 21094580]

約数ペア:

[(1, 21094580), (2, 10547290), (4, 5273645), (5, 4218916), (10, 2109458), (13, 1622660), (20, 1054729), (26, 811330), (52, 405665), (65, 324532), (79, 267020), (130, 162266), (158, 133510), (169, 124820), (260, 81133), (316, 66755), (338, 62410), (395, 53404), (676, 31205), (790, 26702), (845, 24964), (1027, 20540), (1580, 13351), (1690, 12482), (2054, 10270), (3380, 6241), (4108, 5135)]